Partitioning is a commonly touted method for achieving performance in MySQL and other databases. (See here, here, here and many other examples.) I started wondering where the performance from partitions comes from, and I’ve summarized some of my thoughts here.
But first, what is partitioning? (I’ve taken the examples from Giuseppe Maxia’s Partitions in Practice intro.)
CREATE TABLE by_year ( d DATE ) PARTITION BY RANGE (YEAR(d)) ( PARTITION P1 VALUES LESS THAN (2001), PARTITION P2 VALUES LESS THAN …[Read more]